corrected various links in ultradns.md

[kundan2707]

Description
Corrected various ultraDNS related links in https://github.com/kubernetes-sigs/external-dns/blob/master/docs/tutorials/ultradns.md

Fixes #3523

Checklist

• Unit tests updated
• End user documentation updated

[kundan2707]

/kind documentation

[szuecs]

@kundan2707 how do we know that this is true?
I checked that the .com page is hosted at AWS and .neustar is hosted on an IP which is owned by neustar company.
So right now I can't judge about, if the .com page is owned by neustar company or if it's a fake site by someone else. SAN entry of the .com cert shows that it has "DNS Name: *.ultradns.neustar", so likely you are right.
Do you have maybe other references?

[kundan2707]

@szuecs there is no other portals for ultraDNS portal which one is publicly accessible.

[szuecs]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kundan2707, szuecs

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [szuecs]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[szuecs]

@kundan2707 can you sign the EasyCLA, this blocks the PR

[kundan2707]

@szuecs i signed easycla and now its showing no cncf-cla

[szuecs]

@kundan2707 no idea. Can you please reach out to some kubernetes automation folks maybe try via slack?

[szuecs]

/close

[k8s-ci-robot]

@szuecs: Closed this PR.

In response to this:

/close

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[szuecs]

Since there was no response I cleanup the PR

[kundan2707]

@szuecs created new PR as easycla things havnt got resolved in this PR.
#3794